Sucker rod stabilizer



Dec. 28, 1937. v I c cos ow 2,103,236

SUCKER Ron STABILIZER Filed Jan, 6, 19s")' K WE TOR.

ATTORNEYS.

Patented Dec, 28, 1937 PATENT oFFI'cE SUCKER non" s'rABnJznn- Chester L. Coshow, Oklahoma City, Okla assignor of thirty-five percent to Lucille Afiiuguley and thirty-five percent to John E. Lucas, both V of Oklahoma City, Okla.

- Application My invention relates to improvements in sucker rod stabilizer especially adapted to prevent pump rods from breaking while pumping oil and the likefrom deep wells. 1

The principal objects of my invention are to, provide a device of -this character which is pQsitive in action, simple and inexpensive in construction; new, novel, and easily operated; which is strong, durable, reliable, and of evident utility; which'cannot easily get-out of order and is efiicient for the purposes for which it is intended; to provide a device which may be inserted as a" section of a sucker rod in one or more places in its length and become an integral part thereof to provide a barrel or cylinder having a piston and piston rod, the latter passing through a stufling box at the upper end of said cylinder and connecting directly to the sucker rod; to provide a closing membR for the lower end of the cylinderto connect with the sucker rod below the said cylinder; to provide valved fluid passages vertically through the said piston; to provide means on the memberswithin the said cylinder for locking the parts so that the cylinder will turn withthe sucker rod in screwing sec'tions of the said rod together. a

With these and other objects inviefw my in-- vention consists of the construction; 'novel fea-, tures'and combination of parts hereinafter more 30 fully described, illustrated in the accompanying one sh et drawing and pointed out in the claim hereto alspended. 'Various changes'in the form,

proportion, size, shape, weight andminor details of construction, within the scope of my inven- Q tion may be resorted to without departing from the'spirit or broad principle pf my dnvention or yielding any of its benefits. In the accompanying drawing, Figure 1 is a fragmentary vertical section ,of the assembled device; Fig. 2 .is a section of the piston; Fig. 3 is -'a perspective view of the stugling' box member for the upper end of the cylinder; and Fig. 4 is a fragmentary perspective view 'oLthe upper'end of the -piston.'-' g V B 'In. -the following description 'like reference numbers designate like parts in all the figures, and it is tobe understood that thedrawing is to be interpreted as being illustrative and not restrictive.

In the recoverynpf oil by pumping from deep horizons di mculties' are encountered which, are not'found in shallow'production. The pump cylinder is located at the bottom of the well, and when this ,is at a depthot some 6500 feet the sucl;er1;od to actuate the pump cylinder must be January 6, 1937, Serial No. 119,284 1 claim. ((1255-27).-

I is filled. Pistori 5, Withln't lugs III on the u for the light fluid; or oil; each with a ball check two, having ball check "and perforated plug. I 8

forfated plug 20. When the reciprocation a rod Piston 5, as illustrated, is provided with pistonabout one and one-fourth miles long. The casing and oil string to this great depth is not-perfectly straight and perpendicular but sinuous and perhaps slanting. When the sucker rod is recipro-0 cated to actuate the cylinder, the side sway within the oil string of pipe, thesinuosity and possible inclination of the pipe together with what isjanalgous to backlash, introduces such a great tenvsile strain in the said rod that it breaks. My im- .rods, has saved time now wasted in fishing for broken rods, and has thus increased production.

one embodiment of my invention is shown as' follows: The cylinder or barrel I is partly closed at the upper end. by stufilng box 2 provided with wrench hex 22. Gland} is threaded into stumng box 2 and has an enlarged upper extension with fishing rings 23. Packing rifjg l prevents the escape of the light fluid with which the cylinder cylinder I,'is iminersed in the said light fluid or oil andfis reciprocated by piston rod 6. Provided with a'pin l for connecting with the sucker rod. Threads 8, on the lower end of ,rod 6, register inthe tapped hole ll of piston 51 for assembling the members I, 2, 3, 4, and 5. The slots 9, on the inner lower face of stufling box 2, are adapted to register with r face of piston 5 in order to. rigidly'secure pis on rod 8 while suckerrodslare being screwed on or tightened above or below the stabilizer. The lower opening ohcylinder I is closed by plug member- II terminating downdn" 1 box- I2 to which is attached sucker rod I3.

Piston 5 has two longitudinal ports or passages valve, but the said valves are in opposite faces of the piston. While only two ports are showmitis' understood thatmore than two ports may be used if deemednecessary. Port I5 is the larger of the at its upper end Said port I 5 allows the fluid to pass upward more-freely through piston 5 as the saiii'piston moves downward within cylinder I. The fluid passes through the perforations in I bove the said piston 5. During this cycle the s alier port I6 is closed against the upward pas sage oi fluid by ball check I9, held in place by re '6 reverses, port I6 is opened for the-passage oi fluid downward through piston 5; while port I is closed. The action, as just described,,can', readily understood by consulting Figures 1 and 2.

ring grooves 2! for inserting piston rings if it is found necessary to use them, but no rings are shown in-the drawing Sucker rods of the great length needed to con-.-

nect the pumping engine at the mouth of the well with the pumping cylinder at the bottom of the hole will have a dead weight of several tons. The weight of the oil being raised, plus the frictional stresses and back lashing, vibration or whipping of the sucker rod within the-oil string in overcoming inertia, together with the said dead weight of the rod'is more than even high tension steel rods canfwithstand. In the reciprocation of the sucker r d, gravity pull lowers the rod, but when the reversal of motion takes place the shock causes the rod to snap off. My improved stabilizer with several quarts of light fluid or oil in the cylinder acts as a shock absorber and prevents breaking the rod. On the clown stroke, oil passes upward through the larger port until apart or all of the oil is above the piston. On the upstroke, the oil flows down through the smaller port and absorbs the shock of the sudden reversal of direction of the rod. The dimensions of the two ports may be adjusted to the speed of the pumping engine. One or more of the stabilizers may be coupied into the line of sucker rods, depending on.

the depth of the hole or other factors.

While these specifications are directed tq the use of my device in pumping 011 it is to be understood I do not limit myself to this use only, as it may be applied to sucker rods and the like wher ever difficulty is encountered with broken rods.

Having thus described my invention what I claim as new'and desire to secure by Letters Patent is:

In a device of the class described, in combination with a sucker rod, a cylinder, a plug for closing the lower end of said cylinder having a downward extension with a box for,c0nnecting with a sucker rod, a stufllng box closure for the upper end of said cylinder having slots on its lower face, a gland member for said stufling box having an upward extension provided with fishing rings, a'

piston rod for reciprocating through said stufiing box, a pin formed on the upper end of said piston rod for connecting with a sucker rod, a piston secured to the lower end of said piston rod for reciprocation within the said cylinder, lugs formed on the upper face of said piston for registering in said slotsof said stufllng box for locking said piston rod and piston against turniri'g with reference to said cylinder, said piston having longitudinal ports formed therein for the passage of fluid port CHESTER L. COSHOW. 

